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78bcb55e1c
Update ProcessMemoryLinux to be constructed from PtraceConnection instead of being Initialize()d with a pid_t. This allows consolidating PtraceClient's BrokeredMemory with ProcessMemoryLinux and providing the PtraceConnection as a alternative to the memory file (previously only done for brokered connections). Change-Id: I1363e208030eaf595fb8051e9a2c6b255c1f9886 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3072402 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Joshua Peraza <jperaza@chromium.org>
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
// Copyright 2017 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/process/process_memory_linux.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <algorithm>
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#include <limits>
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#include "base/logging.h"
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#include "base/posix/eintr_wrapper.h"
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namespace crashpad {
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ProcessMemoryLinux::ProcessMemoryLinux(PtraceConnection* connection)
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: ProcessMemory(), mem_fd_() {
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char path[32];
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snprintf(path, sizeof(path), "/proc/%d/mem", connection->GetProcessID());
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mem_fd_.reset(HANDLE_EINTR(open(path, O_RDONLY | O_NOCTTY | O_CLOEXEC)));
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if (mem_fd_.is_valid()) {
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read_up_to_ = [this](VMAddress address, size_t size, void* buffer) {
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ssize_t bytes_read =
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HANDLE_EINTR(pread64(mem_fd_.get(), buffer, size, address));
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if (bytes_read < 0) {
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PLOG(ERROR) << "pread64";
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}
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return bytes_read;
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};
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return;
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}
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read_up_to_ = std::bind(&PtraceConnection::ReadUpTo,
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connection,
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std::placeholders::_1,
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std::placeholders::_2,
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std::placeholders::_3);
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}
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ProcessMemoryLinux::~ProcessMemoryLinux() {}
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ssize_t ProcessMemoryLinux::ReadUpTo(VMAddress address,
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size_t size,
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void* buffer) const {
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DCHECK_LE(size, size_t{std::numeric_limits<ssize_t>::max()});
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return read_up_to_(address, size, buffer);
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}
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} // namespace crashpad
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